Add protobuf serialization to DisplayItemList

cc/playback/compositing_display_item.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/playback/compositing_display_item.h"
 
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event_argument.h"
+#include "cc/proto/display_item.pb.h"
+#include "cc/proto/gfx_conversions.h"
+#include "cc/proto/skia_conversions.h"
 #include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkData.h"
+#include "third_party/skia/include/core/SkFlattenable.h"
+#include "third_party/skia/include/core/SkFlattenableSerialization.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 #include "ui/gfx/skia_util.h"
 
 namespace cc {
 
 CompositingDisplayItem::CompositingDisplayItem() {
 }
 
 CompositingDisplayItem::~CompositingDisplayItem() {
 }
 
 void CompositingDisplayItem::SetNew(uint8_t alpha,
                                     SkXfermode::Mode xfermode,
                                     SkRect* bounds,
                                     skia::RefPtr<SkColorFilter> cf) {
   alpha_ = alpha;
   xfermode_ = xfermode;
   has_bounds_ = !!bounds;
   if (bounds)
     bounds_ = SkRect(*bounds);
   color_filter_ = cf;
 
   // TODO(pdr): Include color_filter's memory here.
   size_t external_memory_usage = 0;
   DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 1 /* op_count */,
                       external_memory_usage);
 }
 
+void CompositingDisplayItem::ToProtobuf(proto::DisplayItem* proto) {
+  proto->set_type(proto::DisplayItem::Type_Compositing);
+
+  proto::CompositingDisplayItem* details = proto->mutable_details_compositing();
+  details->set_alpha(static_cast<uint32_t>(alpha_));
+  details->set_mode(SkXfermodeModeToProto(xfermode_));
+  if (has_bounds_)
+    RectFToProto(gfx::SkRectToRectF(bounds_), details->mutable_bounds());
+
+  if (color_filter_) {
+    skia::RefPtr<SkData> data =
+        skia::AdoptRef(SkValidatingSerializeFlattenable(color_filter_.get()));
+    if (data->size() > 0)
+      details->set_color_filter(data->data(), data->size());
+  }
+}
+
+void CompositingDisplayItem::FromProtobuf(const proto::DisplayItem& proto) {
+  DCHECK_EQ(proto::DisplayItem::Type_Compositing, proto.type());
+
+  const proto::CompositingDisplayItem& details = proto.details_compositing();
+  uint8_t alpha = static_cast<uint8_t>(details.alpha());
+  SkXfermode::Mode xfermode = SkXfermodeModeFromProto(details.mode());
+  scoped_ptr<SkRect> bounds;
+  if (details.has_bounds()) {
+    bounds.reset(
+        new SkRect(gfx::RectFToSkRect(ProtoToRectF(details.bounds()))));
+  }
+
+  skia::RefPtr<SkColorFilter> filter;
+  if (details.has_color_filter()) {
+    SkFlattenable* flattenable = SkValidatingDeserializeFlattenable(
+        details.color_filter().c_str(), details.color_filter().size(),
+        SkColorFilter::GetFlattenableType());
+    filter = skia::AdoptRef(static_cast<SkColorFilter*>(flattenable));
+  }
+
+  SetNew(alpha, xfermode, bounds.get(), filter.Pass());
+}
+
 void CompositingDisplayItem::Raster(
     SkCanvas* canvas,
     const gfx::Rect& canvas_target_playback_rect,
     SkPicture::AbortCallback* callback) const {
   SkPaint paint;
   paint.setXfermodeMode(xfermode_);
   paint.setAlpha(alpha_);
   paint.setColorFilter(color_filter_.get());
   canvas->saveLayer(has_bounds_ ? &bounds_ : nullptr, &paint);
 }
@@ skipping 16 matching lines @@
 }
 
 EndCompositingDisplayItem::EndCompositingDisplayItem() {
   DisplayItem::SetNew(true /* suitable_for_gpu_raster */, 0 /* op_count */,
                       0 /* external_memory_usage */);
 }
 
 EndCompositingDisplayItem::~EndCompositingDisplayItem() {
 }
 
+void EndCompositingDisplayItem::ToProtobuf(proto::DisplayItem* proto) {
+  proto->set_type(proto::DisplayItem::Type_EndCompositing);
+}
+
+void EndCompositingDisplayItem::FromProtobuf(const proto::DisplayItem& proto) {
+  DCHECK_EQ(proto::DisplayItem::Type_EndCompositing, proto.type());
+}
+
 void EndCompositingDisplayItem::Raster(
     SkCanvas* canvas,
     const gfx::Rect& canvas_target_playback_rect,
     SkPicture::AbortCallback* callback) const {
   canvas->restore();
 }
 
 void EndCompositingDisplayItem::ProcessForBounds(
     DisplayItemListBoundsCalculator* calculator) const {
   calculator->Restore();
   calculator->AddEndingDisplayItem();
 }
 
 void EndCompositingDisplayItem::AsValueInto(
     base::trace_event::TracedValue* array) const {
   array->AppendString("EndCompositingDisplayItem");
 }
 
 }  // namespace cc